This is a question that societies have been struggling with for millennium! We have to recognize that there are two interest that are in a constant headlock. On one hand you have the interests of the elected politicians and their constituents that receive "special interest". On the other hand you have the interests of the governed public.
There is no easy answer. The mass media outlets are corporations and they are in cahoots with big government. This means that traditional media is able to control the way our politicians are presented to the general public. It is difficult to know what promises are really being fulfilled or are being broken! In the past, when a government had gotten too big and irresponsible it's people would throw a civil revolt and remove the government. Certainly not as viable an option these days.
To answer your question, the internet is our best choice right now. It is the only medium that the general public has access to that isn't highly regulated and controlled yet. If people continue to gather in communities, share their grievances against elected leaders, and work towards action then perhaps responsibility may follow. Regardless, it takes mass opinion to create action. To create change, large numbers of people have to stand up and demand it. I'm not sure there is a perfect answer but we can start here.